<template>
    <div class="todo-footer">
        <label>
            <input type="checkbox" v-model="checkedAll"/>
        </label>
        <span>
            <span>已完成{{ doneTodo }}</span> / 全部{{ allTodo }}
        </span>
        <button class="btn btn-danger" @click="clearAllDoned">清除已完成任务</button>
    </div>
</template>

<script>
    export default {
        name: "TodoFooter",
        props: {
          clearAllDoned:{
            type:Function,
            required:true
          },
          todolist:{
            type:Array,
            required:true
          },
          checkedAllTodo:{
            type:Function,
            required:true
          }

        },
        computed:{
          allTodo(){
            return this.todolist.length
          },
          doneTodo(){
            return this.todolist.filter(item=>item.done).length
          },
          checkedAll:{
            get(){
              return this.allTodo === this.doneTodo
            },
            set(value){
              this.checkedAllTodo(value)
            }
          }
        }
    }
</script>

<style scoped>
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>